Air purifier

ABSTRACT

This air purifier consists of a rectangular unit having two opposite grills in its walls through which the air in a room enters and leaves. The Air entering the unit passes through one of the grills which is equipped with a filter containing activated carbon, and before it is discharged through the opposite grill, it is exposed to the action of ultraviolet light. The air is sucked into and forced out of the unit by means of an electrically motorized fan located inside of the unit.

United States Patent [1 1" Brauss et al.

[111 3,750,370 1 Aug. 7, 1973 1 1 AIR PURIFIER [75] Inventors: ErhardBrauss; Albert l)er cho,both

' of Windsor, Ontario, Canada [73] Assignee: Proto Manufacturing Ltd.,Windsor,

Ontario, Canada [22] Filed: Dec. 9, 1971 [21] Appl. No.: 206,342

[52] U.S. Cl 55/279, 21/74 R, 21/DIG. 2, 55/311, 55/316, 55/387, 55/467,55/481,

[51] Int. Cl 80111 45/00 Field of Search 55/279, 309, 310, 55/311, 312,313, 314, 316, 319, 387, 467,

516, 512, 514; 21/74 R, 53, 74 A, 55, DIG. 2;

[56] References Cited UNITED STATES PATENTS 2,638,644 5/1953 Rauhut55/279 X 2,945,554 7/1960 Berly 55/279 3,071,828 1/1963 Cornell, Jr....21/74 A 3,072,978 l/1963 Minto 21/74 R 3,654,534 4/1972 Fischer 317/262AE 3,685,258 8/1972 Kostel 55/467 X FOREIGN PATENTS OR APPLICATIONS529,210 9/1921 France 204/314 Primary Examiner-Dennis E. Talbert, Jr.Attorney-Charles Krassov 5 7 ABSTRACT This air purifier consists of arectangular unit having two opposite grills in its walls through whichthe air in a room enters and leaves. The Air entering the unit passesthrough one of the grills which is equipped with a filter containingactivated carbon, and before it is discharged through the oppositegrill, it is exposed to the action of ultraviolet light. The air issucked into and forced out of the unit by means of an electricallymotorized fan located inside of the unit.

3 Claims, 4 Drawing Figures PAIENILM 3'. 750.370

//7 Vania/"5 ERHARD BRAUSS ALBERT DERCHO AIR PURIFIER This inventionconsists of an air purifier and deodorizer for use in homes or officesfor reducing the-hazards of pollution to people occuping these premises.

Due to the present day inefficiency in the disposal of industrial andmunicipal wastes, our air is polluted with numerous disease causingbacteria, viruses, and spores, obnoxious gases and fumes, and many typesof pollens to which many people are allegeric. In order to eliminatethese pollutants from the air generally, their source will have to beeliminated; however, the concentration of these pollutants can bebenefically reduced in homes and offices where people spend a great dealof their lifetime.

By use of this invention, pollen, lint, gases and fumes, bacteria,fungus, spores, and odors are entirely eliminated or reduced to such anextent as to be harmless. This is accomplished by recirculating the airin the room through the air purifier wherein solid particles aretrapped, and gases and fumes are absorbed and deodorized by activatedcarbon filters. Bacteria are destroyed by exposing the said air to theaction of ultraviolet light.

In describing the invention reference will be made to the attacheddrawing in which,

FIG. 1 is an isometric view showing the body of the unit,

FIG. 2 is an isometric view showing the cover for the unit,

FIG. 3 is a'plan view showing the interior of the unit, and

FIG. 4 is a wiring diagram of the invention.

In the drawings is shown a rectangular container 1 which consists of abase and two walls. The container 1 is totally enclosed by a cover 2which is provided with two walls located oppositely to the walls of thesaid container. The lower edges of the cover walls have reentrantflanges 3,3, which are provided with tapped holes 3'. The base of thecontainer is provided with holes 4 which correspond with the holes 3'.The cover 2 is attached to the container 1 by means of screws 4 whichhave rubber tipped heads which in turn serve as legs for the unit.

The wall of container 1 in which is located an air exit grill 8 isconsidered the front of the unit and it also contains an electric switch5 by means of which the unit is turned on or off.

One of the items inside the container 1 is a box 6 which contains in thecenter thereofa fan 12 which rotates in a clockwise direction in ahorizontal plane. The said box is attached to the grill 8 which formsone of its walls, but the opposite wall of the said box is not attachedto the grill 9, so that a clear space is provided between the box 6 andthe grill 9. A centrally located circular hole 7 is provided in the topof the box 6 directly above the fan 12.

The wall of the container 1 opposite to the front wall of the saidcontainer, is provided with an air intake grill 9 which is similar tothe grill 8. The rear of the grill 9 is provided with two brackets10,10, which contain a filter ll. This filter consists of two layers ofa filtering material having sandwiched between them a layer of activatedcarbon.

Inside the container 1 is also an electric motor 13 which operates thefan 12, a pair of sockets 14,14, which contain ultraviolet globes 15,15,and a transformer 16.

During the operation of the air purifier unit, the air of the roomenters the said unit through the rear grill 9 where it is filtered anddeodorized by the filter 11. The filtered air is then acted upon by theultraviolet light of the globes 15 to clean it of bacteria, etc., itthen enters the box 6 through the holes 7 and is discharged intothe'room through the grill 8.

Tests, during the operation of the air purifier, have shown thedischarged air to be free of the above mentioned pollutants. However,occassionally a small amount of ozone is formed as a result of theaction of the electrical components within the unit. Where this is foundto be objectionable a filter similar to the filter 11 can also beinstalled in the rear of the grill 8 whereby the ozone odor can beabsorbed.

A plate 17 is provided inside of the box 6, centrally located betweenthe edge of the hole 7 and the rear of the grill 8, the purpose of whichis to have air entering on one side of it through the grill 8 anddischarging through the same grill on the other side of it, when thefilter 11 gets plugged and has to be replaced. This is a safety factorto prevent the overloading of the motor 13 until the filter is replaced.

Having described the invention, what we claim is:

l. A domestic air purifying unit comprising an enclosed rectangularcontainer with a removable cover, having an air intake grill in one ofits walls and an air discharge grill in its opposite wall, the saidintake grill being provided with a filtering and deodorizing medium, andgermicidal means; and means for bypassing the said filtering medium whenit is plugged; in combination with an electrically motorized fan,ultraviolet light source, an electrical transformer, and an on and offswitch, located within the said container.

2. A domestic air purifying unit comprising an enclosed rectangularcontainer which is provided with a removable cover, the said containerconsisting of a base and two walls, and the said cover having a top andtwo walls located oppositely to the walls of the container; an airintake grill located in the rear wall of the said container and an airdischarge grill located in the front wall of the said container; saidintake grill being provided with a filter made up of two layers of fineporous material and a layer of activated carbon between them; incombination with an electrically motorized fan rotating clockwise in ahorizontal plane and housed within a rectangular enclosure having anopening directly above the said fan, said fan enclosure being directlyconnected to the said air discharge grill and contained within the saidcontainer; an electric motor to operate the said fan; a plurality ofultraviolet lights located within the said container for germicidalpurposes; a transformer for reducing the power source to the requiredvoltage; an on and MT switch; and a baffle plate located between the fanand the discharge grill centrally located on that grill.

3. An air purifying unit such as described in claim 2, which is providedwith an air filter at the air discharge grill similar to the air filterat the air intake grill.

ilk it i i

1. A domestic air purifying unit comprising an enclosed rectangularcontainer with a removable cover, having an air intake grill in one ofits walls and an air discharge grill in its opposite wall, the saidintake grill being provided with a filtering and deodorizing medium, andgermicidal means; and means for bypassing the said filtering medium whenit is plugged; in combination with an electrically motorized fan,ultraviolet light source, an electrical transformer, and an on and offswitch, located within the said container.
 2. A domestic air purifyingunit comprising an enclosed rectangular container which is provided witha removable cover, the said container consisting of a base and twowalls, and the said cover having a top and two walls located oppositelyto the walls of the container; an air intake grill located in the rearwall of the said container and an air discharge grill located in thefront wall of the said container; said intake grill being provided witha filter made up of two layers of fine porous material and a layer ofactivated carbon between them; in combination with an electricallymotorized fan rotating clockwise in a horizontal plane and housed withina rectangular enclosure having an opening directly above the said fan,said fan enclosure being directly connected to the said air dischargegrill and contained within the said container; an electric motor tooperate the said fan; a plurality of ultraviolet lights located withinthe said container for germicidal purposes; a transformer for reducingthe power source to the required voltage; an on and off switch; and abaffle plate located between the fan and the discharge grill centrallylocated on that grill.
 3. An air purifying unit such as described inclaim 2, which is provided with an air filter at the air discharge grillsimilar to the air filter at the air intake grill.